EN 1993 is a set of rules that help people design structures like buildings and bridges. These rules tell you how to make sure that the structure you are building is strong enough to support the weight of people and things on it.
The rules are like a recipe for building something strong and safe. Just like when you make a cake, you need to follow the recipe to make sure the cake turns out well. Similarly, when you build a structure, you need to follow the EN 1993 rules to make sure that the structure is safe and strong.
The rules cover many different things like how thick the metal needs to be, where to put the supports, and how many bolts you need to use. All of these things work together to make sure that the structure is strong.
By following the EN 1993 rules, people can build structures that are safe for everyone to use. It's like making sure that you have everything you need to make a strong, sturdy cake.